A place like the Right Livers' Rest was bound to draw freaks, same as molasses draws flies. 1935, George Goodchild, chapter 5, in Death on the Centre Court: By one o'clock the place was choc-a-bloc.
Swallowing certain types of poisons may cause excessive salivation. According to the National Library of Medicine, pesticides can cause excessive saliva when they are swallowed. Venom from snake bites or insect stings is another type of poisoning that can cause the malady.
Stimulation of saliva by non-food products such as sugarless chewing gum can increase the salivary flow rate with no detrimental effects on the oral tissues. Masticatory stimulation such as gum chewing causes the salivary glands to produce more fluid. This stimulated saliva contains more ions, including neutralizing bicarbonate, calcium, and phosphorous, which are available to remineralize dental enamel.